Very fine Swiss 18K gold envelope-form watch Circa 1965

Gold watch in the shape of an envelope by Piaget
–
A Swiss 18 carat gold envelope-form watch, circa 1965. Lever movement, manual winding, 18 jewels. White enamel dial with Roman hours, blued steel hands. Case engraved, the back secured by four screws, it opens with light pressure to the centre. Dial signed, case and movement signed and numbered. Comes with an original Piaget pouch.
–
Dimensions: 41.5 x 31 mm
–
Signed: Piaget Swiss